LJ in TX

own P trap or do they both share the same trap? most likely they have their own trap .,..and I am assuming the trap is faulty on the one sink…question is why the trap is dryihg out,,could it be that this particular sink is not used very often allowing the trap to dry out.?? flushing the trap out ,,I dont thinkk will solve this but you can certainly try. good luck LJ